Natsu no Owari ni Kimi ga Shineba Kanpeki Dattakara

Eto Hinata, a boy living in the countryside, has no hope for the future due to his poor family environment. Then, a female university student, Tomura Yaeko, who suffers from a fatal disease that turns her body into gold bars, appears before him and offers to inherit her corpse, which can be sold for 300 million yen after her death. When faced with such an overwhelming sum of money, will his feelings for her be genuine? A tragic and heartbreaking story of one summer's love.

(Source: Web Ace, translated)